   <!-- Left side column. contains the logo and sidebar -->
   <aside class="main-sidebar ">
       <!-- sidebar: style can be found in sidebar.less -->
       <section class="sidebar">
           <!-- Sidebar user panel -->
           <div class="user-panel">
               <div class="pull-left image">
                   <img src="<?= \common\components\Upload::tomdia(Yii::$app->user->identity->avatar) ?>" class="img-circle" alt="User Image">
               </div>
               <div class="pull-left info">
                   <p><?= Yii::$app->user->identity->username ?></p>
                   <a href="#"><i class="fa fa-circle text-success"></i> Online</a>
               </div>
           </div>
           <!-- search form -->
           <form action="#" method="get" class="sidebar-form">
               <div class="input-group">
                   <input type="text" name="q" class="form-control" placeholder="Search...">
                   <span class="input-group-btn">
                       <button type="button" name="search" id="search-btn" class="btn btn-flat" onclick="search_menu()"><i class="fa fa-search"></i>
                       </button>
                   </span>
               </div>
           </form>
           <!-- /.search form -->
           <!-- sidebar menu: : style can be found in sidebar.less -->
           <ul class="sidebar-menu">

           </ul>
       </section>
       <!-- /.sidebar -->
   </aside>